23213021121 has 16 divisors (see below), whose sum is σ = 34399297920. Its totient is φ = 15471010800.

The previous prime is 23213021119. The next prime is 23213021131. The reversal of 23213021121 is 12112031232.

It is not a de Polignac number, because 23213021121 - 2¹ = 23213021119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23213021094 and 23213021103.

It is not an unprimeable number, because it can be changed into a prime (23213021131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20830 + ... + 216471.

It is an arithmetic number, because the mean of its divisors is an integer number (2149956120).

Almost surely, 2^23213021121 is an apocalyptic number.

It is an amenable number.

23213021121 is a deficient number, since it is larger than the sum of its proper divisors (11186276799).

23213021121 is a wasteful number, since it uses less digits than its factorization.

23213021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240933 (or 240927 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 23213021121 its reverse (12112031232), we get a palindrome (35325052353).

The spelling of 23213021121 in words is "twenty-three billion, two hundred thirteen million, twenty-one thousand, one hundred twenty-one".